tacheometeric survey

Principle of stadia method used in Tacheometric surveying is shown in figure; the distance 'ab' i.e. 'i' refers to_____________

• staff intercept

• focal length of the objective

• interval between the stadia hairs

• distance of vertical axis of the instrument from 'O'

• None of the above

the anallactic lens provided in tacheometer is a

• Convex and Concave lens

• Convex lens

• Plane lens

• Concave lens

A tacheometer was set up at station A, and observations were taken on staff held at B , the vertical circle reading being zero. The readings were 2.980 2.660 m, and 2.340 m. The instrument's multiplying and additive constants were 100 and 0.5, respectively. The reading from A to a staff held at a BM of elevation 1020.50 m was 2.85m. Find the distance AB and elevation of point B.

• 32.5 m and 120.69 m

• 64.5 m and 1021.69 m

• 64.5 m and 1020.69 m

• 32 m and 1021.69 m

The number of horizontal cross wires in a stadia diaphragm are

• 3

• 2

• 4

• 5

Two distances, 200m and 290 m, are measured from the tacheometer instrument, and the corresponding staff intercepts are 2m and 3 m, respectively. Additive constant will be

• 2

• 4

• 98

• 1

• the constant by sin²ϴ

• the constant by cos²Θ

• the constant by cos Θ

• the multplying constant by cos²Θ and additive constant by cosΘ

The external focusing anallatic telescope in tacheometric surveying is also known as ____ telescope

• central

• Porro's

• Vernier

• adjusting

A tacheometer was set up over a station P of R.L. = 378 m , the height of the instrument axis being 1.23 m. . The stadia hair readings on a staff held vertically at station Q were 1.2 , 1.93, and 2.65 m, respectively, while the vertical angle was -6°30′. Find the distance PQ and RL of Q. The constant K=100 and C=0.3

• 143.440 m and 360.957 m

• 143.440 m and 393.643 m

• 141.385 m and 360.957 m

• 141.385 m and 393.643 m

The following are the observations that were taken by a tacheometer fitted with an anallatic lens having a multiplying constant of 100. Calculate the PQ and the RL of Q.

• 164.598 m and 95.877 m

• 164.197 m and 95.877 m

• 165 m and 72.913 m

• 165 m and 95.877 m